EP2990275B1 - Générateur de gaz - Google Patents

Générateur de gaz Download PDF

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Publication number
EP2990275B1
EP2990275B1 EP14788812.7A EP14788812A EP2990275B1 EP 2990275 B1 EP2990275 B1 EP 2990275B1 EP 14788812 A EP14788812 A EP 14788812A EP 2990275 B1 EP2990275 B1 EP 2990275B1
Authority
EP
European Patent Office
Prior art keywords
point
closing member
gas generator
groove
distance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14788812.7A
Other languages
German (de)
English (en)
Other versions
EP2990275A4 (fr
EP2990275A1 (fr
Inventor
Tomoharu Kobayashi
Mikio Yabuta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daicel Corp
Original Assignee
Daicel Corp
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Filing date
Publication date
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Publication of EP2990275A1 publication Critical patent/EP2990275A1/fr
Publication of EP2990275A4 publication Critical patent/EP2990275A4/fr
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Publication of EP2990275B1 publication Critical patent/EP2990275B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
    • B60R21/274—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas characterised by means to rupture or open the fluid source
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26029—Ignitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26076—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow characterised by casing

Definitions

  • the present invention relates to a gas generator used in a restraining device of an airbag system for a vehicle.
  • an opening portion of a bottle in which the pressurized gas is sealed is closed by a closing member and the pressurized gas is discharged by rupturing the closing member during activation.
  • the closing member is required to be reliably ruptured at the time of activation when a shock wave or pressure is generated, and when the closing member is ruptured by a shock wave or pressure generated by the activation of an ignition device using an explosive, or the like, it is preferred that a small load be sufficient for the rupturing.
  • US-A No. 2003/0146612 discloses a closure 50 to be ruptured by a gas pressure is mounted on an opening end of a cylindrical casing 40.
  • the present invention provides a gas generator, including a cylindrical housing having therein,
  • Fig. 2(a) and Fig. 2(d) indicate that the closure is ruptured and opened outward from the central portion considering the shape of the groove
  • Fig. 2(c) and Fig. 2(e) indicate that, in view of the shape and formation state of the groove, the middle portion is separated as a unit and opened as a circle
  • Fig. 2(b) also indicates that, supposing the groove formed spirally with equal pitch from the center (the base point), the middle portion is separated as a unit and opened as a circle.
  • the present invention provides a gas generator in which a closing member can be reliably ruptured and opened by a small load when the gas generator is used in a restraining device such as an airbag system for a vehicle.
  • the gas generator in accordance with the present invention may be of a hybrid type in which the airbag is inflated by using both the pressurized gas and the combustion gas generated by combustion of a gas-generating agent, or of a stored type in which the airbag is deployed by the pressurized gas alone, without using the gas generating agent.
  • the cylindrical housing may be formed by a single housing as a whole or by a pressurized gas chamber housing forming a pressurized gas chamber and an ignition device chamber housing forming an ignition device chamber.
  • the closing member is present between the pressurized gas chamber and the ignition device chamber and may be fixed to or integrally formed with the housing.
  • the closing member may be fixed to either one of the housings or formed integrally with either one of the housings.
  • the center of the closing member be taken as X1 so that the axis X1 of the cylindrical housing passes through the center of the closing member.
  • the crossing point X2 of the closing member may or may not coincide with the center X1 of the closing member.
  • the fragile portion is formed on the surface of the closing member that directly faces the piston or on the opposite surface thereof.
  • the groove of the closing member is formed as a curve connecting points from the start point A to the end point E.
  • the curve connecting the points forms, as a whole, an about single-turn spiral passing through the respective points, rather than a zigzagging portion such as a wavy line.
  • the groove serving as a fragile portion can have a V-like, rectangular, or trapezoidal cross-sectional shape in the width direction.
  • the groove serving as a fragile portion may be a continuous or discontinuous groove. However, when a discontinuous groove is provided, the gaps between the adjacent grooves are adjusted so as to enable the rupture to advance along the grooves at the time of activation.
  • the end point E of the groove may be set apart from the circumferential portion of the closing member or may reach the circumferential portion.
  • the piston is moved by the shock wave or pressure generated from the ignition device at the time of activation, and the distal end portion of the rod pushes the closing member.
  • the rupture starts from the start point A which is the closest to the crossing point X2, or from any portion between the start point A and the first intermediate point B, and the rupture and opening proceed continuously to the end point E through the first intermediate point B, the second intermediate point C, and the third intermediate point D.
  • the area of opening formed in the closing member is small and an amount of discharged gas is also small, but as advancing toward the end point E, the area of opening increases and an amount of discharge gas also increases.
  • a load is concentrated by the rod of the piston in part of the closing member, and a rupture is started from this part. It is preferred that a diameter of the rod be less than a pressure-receiving surface (a surface facing the ignition device) of the piston.
  • the ignition device can be downsized and a lightweight gas generator can be provided (the second operation effect).
  • the present invention includes the following preferred aspects.
  • the closing member has a fragile portion on one surface thereof, the fragile portion is a groove formed in a shape of a circle or an ellipse extending from a start point A to an end point E and having a center (X3) different from the center (X1) of the closing member, but the groove is not formed on the circumference of the circle or the ellipse where the start point A and the end point E are close to each other, and distances from the center (X1) of the closing member to the start point A and to the end point E satisfy the following relationship: the distance to the start point A ⁇ the distance to the end point E.
  • the first and second operation effects can be also exhibited by such a gas generator.
  • the length of a portion, which is located from the start point A to the end point E and in which the groove is not formed is within a range of 5% to 40% of the circumferential length of the circle or the ellipse.
  • the end point E preferably has a rupture-stopping means in the fragile portion.
  • rupture-stopping means By providing the rupture-stopping means, it is possible to prevent the rupture which has reached the end point E from advancing. Therefore, ruptured pieces are not generated and the gas discharge path is not closed by the torn-out ruptured pieces.
  • Any rupture-stopping means may be used as long as it can stop the rupture and prevent the rupture that has reached the end point from advancing.
  • a method for attaching another member of a certain thickness to the end point E a method for hardening the organization at the end point E by heating, such as welding, and a method for dispersing the stresses that have reached the end point E can be used.
  • the stress-dispersing portion disclosed in JP-A No. 2005-238948 (for example, the stress-dispersing portion shown in Fig. 1 and described in paragraphs [0029]-[0032]) and the rupture-blocking portion disclosed in JP-A No. 2012-171362 (for example, the rupture-blocking portion 14 shown in (a) in Fig. 1 and described in paragraph [0047]) can be used as a stresses dispersing means.
  • the closing member sealing the pressurized gas chamber housing since the closing member sealing the pressurized gas chamber housing has a specific fragile portion, the rupture is started from the start point A or the vicinity thereof and the rupture advances continuously along the fragile portion to the end point E, and thus the closing member is opened.
  • a cylindrical ignition device chamber housing 20 and a cylindrical pressurized gas chamber housing 40 are joined and integrated to form an outer shell container (a single housing).
  • the ignition device chamber housing 20 and the pressurized gas chamber housing 40 are integrated such that the central axes thereof coincide with the axis X1.
  • an opening at one end of a cylindrical circumferential wall portion 43 is closed with a bottom surface 41.
  • the pressurized gas chamber housing 40 is filled with a gas such as argon or helium.
  • the gas is filled from a pressurized gas filling hole formed in the bottom surface 41, and the filling hole is closed by welding together with a pin 42.
  • an opening at one end of a cylindrical circumferential wall portion 23 is closed with a closing member 12, and the closing member 12 is joined to and integrated with an opening 44 at the other end of the pressurized gas chamber housing 40.
  • the closing member 12 is formed integrally with the circumferential wall portion 23, but the closing member 12 produced as a separate member may be welded and fixed to the circumferential wall portion 23.
  • closing member 12 may be attached to the opening (at the opposite side of the bottom surface 41) of the pressurized gas chamber housing 40.
  • An opened end portion 22 (the opening opposite to the closing member 12) of the ignition device chamber housing 20 is closed by an electric igniter 25 fixed thereto.
  • the electric igniter 25 is fixed by being interposed in the axis X1 direction between an annular protrusion 21a, which protrudes inwardly and is formed in an inner wall surface 21 of the ignition device chamber housing 20, and the opened end portion 22 crimped inwardly.
  • a piston 30 is disposed on the side of the closing member 12 in the ignition device chamber housing 20.
  • a filling chamber 37 filled with a gas-generating agent 38 is formed between the piston 30 and the igniter 25.
  • the piston 30 has a base plate 31 having a pressure-receiving surface 31a facing the filling chamber 37 and a rod 32 extending from a surface 31b on the other side of the pressure-receiving surface 31a.
  • a plenum chamber 34 serving as a gas discharge path.
  • a known coolant or filter may be disposed inside the plenum chamber 34.
  • a plurality of gas discharge ports 27 are formed in the circumferential wall portion 23 facing the plenum chamber 34.
  • a sealing tape is attached from inside to the gas discharge ports to prevent moisture penetration.
  • the base plate 31 abuts against and is movable along the inner wall surface 21 of the ignition device chamber housing 20.
  • the base plate 31 has a plurality of through holes 33 in the thickness direction.
  • the plurality of through holes 33 may be closed with an aluminum adhesive tape or the like which is easily fractured.
  • the rod 32 is positioned on the axis same as the axis X1 of the housing and has the constant outer diameter from a distal end portion 32a to the base plate 31.
  • the diameter of the rod 32 is less than the outer diameter of the base plate 31.
  • the piston 30 is fixed in the axis X1 direction by the base plate 31 abutting against an annular protrusion (a first protrusion) 21b formed in the inner wall surface 21 of the ignition device chamber housing and the distal end portion 32a of the rod 32 abutting against the closing member 12.
  • the closing member 12 receives the inner pressure of the pressurized gas chamber housing 40, the pressure is dispersed in the ignition device chamber housing 20 through the rod 32 and the base plate 31. Therefore, the closing member 12 is not required to be exceedingly thick to increase pressure resistance.
  • a slight gap may be provided between the distal end portion 32a and the closing member 12.
  • the distal end portion 32a of the rod 32 can abut against the closing member 12 when the closing member 12 receives the pressure from the pressurized gas chamber housing 40 and deforms to protrude toward the ignition device chamber housing 20.
  • a step portion (a second protrusion) 26 is formed between the annular protrusion 21b and the closing member 12 in the inner wall surface 21 of the ignition device chamber housing.
  • the base plate 31 slides between the annular protrusion 21b and the step portion (the second protrusion) 26.
  • the closing member 12 has, on one surface 12a (a surface on the side of the plenum chamber 34), a fragile portion 11 that is preferentially ruptured at the time of activation.
  • the fragile portion 11 is a curved groove (for example, a groove with a V-like cross-sectional shape in the width direction) extending from a start point A on Y1 to an end point E on Y1 via a first intermediate point B on Y2, a second intermediate point C on Y1, and a third intermediate point D on Y2.
  • a curved groove for example, a groove with a V-like cross-sectional shape in the width direction
  • the crossing point X2 coincides with a center X1 (coincides with the axis X1) of the closing member 12.
  • the curved groove corresponds to a curve passing through the abovementioned points and forming, as a whole, about one-turn (one-round) spiral.
  • the groove forming the fragile portion 11 is formed such that the distances from the center X1 to the respective points satisfy the following relationship: the distance to the start point A ⁇ the distance to the first intermediate point B ⁇ the distance to the second intermediate point C ⁇ the distance to the third intermediate point D ⁇ the distance to the end point E, and that the start point A is at a position that is not in contact with the rod of the piston at the time of activation.
  • the distal end portion 32a of the rod 32 is adjusted to be positioned so that the distal end portion 32a pushes a region including the crossing point X2 at the time of activation (a region including the center X1 when the crossing point X2 coincides with the center X1).
  • the center of the distal end portion 32a of the rod 32 may or may not coincide with the crossing point X2 and the center X1.
  • the size of the distal end portion 32a of the rod 32 shown in Fig. 1 is one embodiment.
  • the size of the distal end portion 32a is not limited to that shown in Fig. 1 .
  • the distal end portion 32a may be located at the position, for example, closer to any portion on the curve connecting the start point A with the first intermediate point B.
  • the position of the end point E may be such as to be beyond the third intermediate point D and not to be beyond the first intermediate point B.
  • the end point E may be positioned at any of a point (E1) crossing Y1 as shown in (b) in Fig. 3 ; a point (E2) on the side of the third intermediate point D with respect to the crossing point (E1); and a point (E3) that has passed by the crossing point (E1).
  • the position of the end point E2 is preferably at or greater than 0.5 round and less than 1 round, more preferably at or greater than 0.6 round and at or less than 0.9 round, even more preferably at or greater than 0.7 round and at or less than 0.8 round, and even more preferably at 0.75 round.
  • the position of the end point E3 is preferably greater than 1.0 round and at or less than 1.5 round, more preferably at or greater than 1.1 round and at or less than 1.3 round, even more preferably at or greater than 1.2 round and at or less than 1.3 round, and even more preferably at 1.25 round.
  • the preferred range of the groove formed with the curve from the start point A to the end point E is from a groove formed with a curve forming a 0.75-round (0.75-turn) spiral to a groove formed with a curve forming a 1.25-round (1.25-turn) spiral.
  • the end point E is preferably not in contact with a circumferential portion 12b of the closing member 12, but may be in contact therewith.
  • the fragile portion 11 can be provided with a rupture-stopping means for preventing a further rupture beyond the end point E.
  • a rupture-stopping means 111 shown in (a) in Fig. 4 is an arrow-shaped groove formed at the end point E of the groove serving as the fragile portion 11.
  • the end point E and the arrow-shaped groove (the rupture-stopping means 111) are in contact with each other, but may be also disposed at a short distance from each other.
  • a rupture-stopping means 211 shown in (b) in Fig. 4 is a recess (preferably a circular recess) formed at the end point E of the groove serving as the fragile portion 11.
  • the end point E and the recess (rupture-stopping means 211) are in contact with each other, but may be also disposed at a short distance from each other.
  • a rupture-stopping means 311 shown in (c) in Fig. 4 is a V-shaped groove formed at the end point E of the groove serving as the fragile portion 11.
  • the end point E and the V-shaped groove (rupture-stopping means 311) are in contact with each other, but may be also disposed at a short distance from each other.
  • gas generator a hybrid-type gas generator shown in Fig. 1
  • Fig. 1 The operation of the gas generator (a hybrid-type gas generator) shown in Fig. 1 is explained hereinbelow with respect to the case in which the gas generator is used in a restraining device of an airbag system for a vehicle.
  • the gas generating agent 38 located inside the filling chamber 37 is ignited and burned, thereby generating a combustion gas.
  • the base plate 31 collides with the step portion 26, thereby stopping the movement of the rod 32 in the axis X1 direction.
  • the distal end portion 32a thereof is pressed against the portion of the closing member 12 including the center X1, and a rupture starts from the start point A, which is close to the center X1, along the groove.
  • the rupture After the rupture has started, it advances along the groove through the start point A (or between the start point A and the first intermediate point), the first intermediate point B, the second intermediate point C, and the third intermediate point D, in the order of description (see (b) in Fig. 5 ), and eventually the closing member 12 is opened (see (c) in Fig. 5 ).
  • the load applied by the distal end portion 32a of the rod 32 is concentrated in a very narrow region on the closing member 12, and the rupture starts from the start point A located close thereto.
  • the necessary maximum load (force) is reduced by comparison with the case in which the entire closing member 12 is ruptured and opened at once. Therefore, the igniter 25 is reduced in size and weight.
  • the gas generator 10 shown in Fig. 1 is of a hybrid type using the gas generating agent 38, there is no direct correlation between the miniaturization of the igniter 25 and the fragile portion 11 of the closing member 12, and the gas generator 10 has an advantage that a larger portion of the combustion gas generated from the gas generating agent 38 is used for airbag deployment.
  • the closing member is ruptured by the igniter alone. Therefore, the igniter is reduced in size and weight by combining with the closing member 12 having the above-described fragile portion 11.
  • a closing member 112 having a fragile portion 111 of another embodiment will be explained hereinbelow with reference to Fig. 6 .
  • the fragile portion 111 is a groove formed in a shape of a circle or an ellipse extending from a start point A to an end point E and having a center (X3) different from the center X1 of the closing member 112.
  • the groove (the fragile portion) is not formed on the circumference of the circle or the ellipse where the start point A and the end point E are close to each other.
  • the distance from the center X1 of the closing member 112 to the start point A and the distance from the center X1 to end point E satisfy the following relationship: the distance to the start point A ⁇ the distance to the end point E.
  • the length of a portion, which is located from the start point A to the end point E and in which the groove is not formed, is preferably within a range of 5% to 40% of the circumferential length of the circle or the ellipse.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)

Claims (11)

  1. Générateur de gaz (10), comprenant:
    un logement cylindrique contenant,
    une chambre de dispositif d'allumage (20), qui est pourvue d'un orifice de décharge de gaz (27) et renferme un dispositif d'allumage, et
    une chambre de gaz sous pression (40) remplie d'un gaz sous pression, les chambres (20, 40) étant agencées de sorte que leurs axes centraux aient le même axe X1;
    un élément de fermeture (12) de forme circulaire, se fermant entre la chambre de dispositif d'allumage (20) et la chambre de gaz sous pression (40), l'élément de fermeture (12) ayant une partie fragile (11) sur une surface de celui-ci,
    au moins un allumeur (25) et un piston (30), qui est mobile dans la direction de l'axe X1 du logement cylindrique au moment de l'activation, étant disposé à l'intérieur de la chambre du dispositif d'allumage (20), le piston (30) contenant,
    une plaque de base (31) comprenant une surface de réception de pression (31 a) qui reçoit un produit de combustion provenant du dispositif d'allumage, et
    une tige (32) s'étendant dans une direction axiale à partir d'une surface de la plaque de base (31), la tige (32) étant disposée pour venir en butée contre ou face à l'élément de fermeture (12), caractérisé en ce que
    la partie fragile (11) étant une rainure formée avec une courbe s'étendant depuis un point de départ A sur Y1 vers un point d'extrémité E à travers un premier point intermédiaire B sur Y2, un deuxième point intermédiaire C sur Y1 et un troisième point intermédiaire D sur Y2, où Y1 et Y2 sont deux lignes droites tracées pour être orthogonales l'une à l'autre et traverser un point de croisement X2 sur une surface de l'élément de fermeture (12), la rainure étant formée de telle sorte que
    les distances entre le point de croisement X2 et les points respectifs satisfont à la relation suivante: distance jusqu'au point de départ A < distance jusqu'au premier point intermédiaire B < distance jusqu'au deuxième point intermédiaire C < distance jusqu'au troisième point intermédiaire D < distance jusqu'au point d'extrémité E et que le point d'extrémité E est l'un des points E1, E2 et E3, dans lequel E1 est un point traversant Y1 après avoir traversé le troisième point intermédiaire D sur Y2, E2 est un point plus proche du troisième point intermédiaire D que le rapport au point de croisement E1 et E3 est un point ayant franchi le point de croisement E1,
    par le mouvement de la tige (32) dans la direction axiale et repoussant l'élément de fermeture (12) au moment de l'activation, l'élément de fermeture (12) étant rompu le long de la rainure depuis le voisinage du point de départ A jusqu'au point d'extrémité E de la partie fragile (11) et
    la tige (32) ne devant pas entrer en contact avec le point de départ A mais repousser l'élément de fermeture (12) à une position proche de la rainure entre le point de départ A et le premier point intermédiaire B.
  2. Générateur de gaz (10) selon la revendication 1, dans laquelle
    l'axe X1 traverse un centre de l'élément de fermeture (12), et le centre X1 de l'élément de fermeture (12) et le point de croisement X2 coïncident l'un avec l'autre.
  3. Générateur de gaz (10) selon la revendication 1, dans laquelle
    l'axe X1 traverse un centre de l'élément de fermeture (12), et le centre X1 de l'élément de fermeture (12) et le point de croisement X2 ne coïncident pas l'un avec l'autre.
  4. Générateur de gaz (10) selon la revendication 1, dans laquelle
    la partie fragile (11) est une rainure formée en forme de cercle ou d'ellipse s'étendant depuis le point de départ A jusqu'au point d'extrémité E et ayant un centre X3 différent du centre X1 de l'élément de fermeture (12), mais la rainure n'est pas formée pas sur une circonférence du cercle ou de l'ellipse où le point départ A et le point d'extrémité E sont proches les uns des autres,
    et
    une distance depuis le centre X1 de l'élément de fermeture (12) jusqu'au point de départ A et une distance depuis le centre X1 jusqu'au point d'extrémité E satisfont la relation suivante: distance jusqu'au point de départ A < distance jusqu'au point d'extrémité E.
  5. Générateur de gaz (10) selon la revendication 4, dans laquelle
    une longueur d'une partie, allant du point de départ A au point d'extrémité E et dans lequel la rainure n'est pas formée, se situe dans une plage de 5% à 40% de la longueur circonférentielle du cercle ou de l'ellipse.
  6. Générateur de gaz (10) selon l'une quelconque des revendications 1 à 5, dans lequel
    un moyen d'arrêt de rupture (111, 211, 311) est prévu au niveau du point d'extrémité E dans la partie fragile (11).
  7. Générateur de gaz (10) selon l'une quelconque des revendications 1 à 5, dans lequel
    un diamètre de la tige (32) est inférieur à un diamètre de la surface de réception de pression de la plaque de base (31).
  8. Générateur de gaz (10) selon l'une quelconque des revendications 1 à 5, dans lequel
    la plaque de base (31) possède une pluralité de trous traversants (33) dans un sens d'épaisseur et la pluralité de trous traversants (33) sont fermés par un ruban adhésif en aluminium.
  9. Générateur de gaz (10) selon l'une quelconque des revendications 1 à 5, dans lequel
    le piston (30) est fixé dans la direction de l'axe X1 par la plaque de base (31) en butée contre une saillie annulaire (26) formée dans une surface de paroi interne (21) de la chambre de dispositif d'allumage (20) et une partie d'extrémité distale (32a) de la tige (32) vient en butée contre l'élément de fermeture (12).
  10. Générateur de gaz (10) selon l'une quelconque des revendications 1 à 5, dans lequel
    le point de départ A occupe une position qui n'est pas en contact avec la tige (32) du piston (30) à un moment de l'activation.
  11. Générateur de gaz (10) selon la revendication 6, dans lequel
    le moyen d'arrêt de rupture (111, 211, 311) est une rainure en forme de flèche, un évidement ou une rainure en forme de V qui sont formés à la partie d'extrémité E de la rainure qui est en contact avec ou disposée à une courte distance de la partie d'extrémité E.
EP14788812.7A 2013-04-22 2014-03-20 Générateur de gaz Active EP2990275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013089159A JP6095463B2 (ja) 2013-04-22 2013-04-22 ガス発生器
PCT/JP2014/057838 WO2014174955A1 (fr) 2013-04-22 2014-03-20 Générateur de gaz

Publications (3)

Publication Number Publication Date
EP2990275A1 EP2990275A1 (fr) 2016-03-02
EP2990275A4 EP2990275A4 (fr) 2016-12-21
EP2990275B1 true EP2990275B1 (fr) 2017-09-20

Family

ID=51791539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14788812.7A Active EP2990275B1 (fr) 2013-04-22 2014-03-20 Générateur de gaz

Country Status (6)

Country Link
US (1) US9481339B2 (fr)
EP (1) EP2990275B1 (fr)
JP (1) JP6095463B2 (fr)
KR (1) KR20160002734A (fr)
CN (1) CN105142992B (fr)
WO (1) WO2014174955A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6284420B2 (ja) 2014-04-23 2018-02-28 株式会社ダイセル インフレータ
JP6691442B2 (ja) * 2016-06-27 2020-04-28 株式会社ダイセル ガス発生器
JP6801164B2 (ja) * 2017-03-23 2020-12-16 株式会社ダイセル 点火器の固定構造、及び点火器の固定方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19725476A1 (de) * 1997-06-17 1998-12-24 Dynamit Nobel Ag Gasgenerator
DE19954738A1 (de) * 1999-11-12 2001-05-31 Petri Dn Gmbh Inflator Systems Hybrid-Gasgenerator
JP2002211346A (ja) * 2001-01-15 2002-07-31 Takata Corp インフレータ
JP2002347567A (ja) * 2001-05-29 2002-12-04 Takata Corp インフレータ
DE20114664U1 (de) * 2001-09-05 2002-01-17 TRW Airbag Systems GmbH & Co. KG, 84544 Aschau Hybrid-Gasgenerator
JP2003226221A (ja) 2002-02-07 2003-08-12 Takata Corp インフレータ及びそのクロージャ固定構造
US6746046B2 (en) * 2002-03-19 2004-06-08 Autoliv Asp, Inc. Dual flow inflator for a vehicular airbag system
US6857657B2 (en) * 2003-04-07 2005-02-22 Key Safety Systems, Inc. Inflator having a support member capable of sliding to open the pressure vessel
US7607688B2 (en) * 2004-02-25 2009-10-27 Daicel Chemical Industries, Ltd. Rupturable member
JP2005238948A (ja) 2004-02-25 2005-09-08 Daicel Chem Ind Ltd 破裂部材
GB2417066B (en) * 2004-08-13 2006-12-06 Autoliv Dev Improvements in or relating to an inflator for an air-bag
US7695009B2 (en) * 2005-01-13 2010-04-13 Autoliv Development Ab Inflator for an air-bag
GB0500684D0 (en) * 2005-01-13 2005-02-23 Autoliv Dev "Improvements in or relating to an inflator for an air-bag"
JP2011051447A (ja) * 2009-09-01 2011-03-17 Autoliv Development Ab エアバッグ用排気装置
DE102011009309B4 (de) * 2011-01-24 2024-02-08 Zf Airbag Germany Gmbh Gasgenerator
JP5616815B2 (ja) 2011-02-17 2014-10-29 株式会社ダイセル ガス発生器用シールテープ
EP2527210B1 (fr) * 2011-05-25 2013-12-25 Autoliv Development AB Gonfleur pour air bag
JP6154147B2 (ja) * 2013-01-30 2017-06-28 株式会社ダイセル ガス発生器
DE102013018886A1 (de) * 2013-11-12 2015-05-13 Trw Airbag Systems Gmbh Berstmembran, insbesondere für einen Gasgenerator, Gasgenerator, Gassackmodul und Fahrzeugsicherheitssystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US9481339B2 (en) 2016-11-01
US20160068133A1 (en) 2016-03-10
CN105142992A (zh) 2015-12-09
JP6095463B2 (ja) 2017-03-15
EP2990275A4 (fr) 2016-12-21
JP2014210557A (ja) 2014-11-13
WO2014174955A1 (fr) 2014-10-30
EP2990275A1 (fr) 2016-03-02
CN105142992B (zh) 2017-10-27
KR20160002734A (ko) 2016-01-08

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